Our communication depends almost completely on words, the spoken word or the written version. Still, non-verbal communication was and is an indispensable part of our communication, like gestures and scent. But do we rely on smell or has speech become more important? If we were to lose our speech, would we make different choices in our lives?
Where we primarily communicate with speech, plants communicate with chemicals. Take grass for example. The smell of a freshly mown lawn is not just a nice fragrance. When grass is mown, it produces substances to protect itself, originally against herbivores. It is a cry for help. The wonderful fragrance can almost be regarded as cold sweat.